PDFExportIT#exportAsPDF is failing when executed from a container

PDFExportIT#exportAsPD is failing consistently when executed inside a xwiki/build container.

Note that this does not occur when the servlet container is itself running inside a docker container.

The urls resolved and communicated to the chrome container are not correct, making it fail to access to servlet (jetty) to proceed to the pdf print

 See https://ci.xwiki.org/job/XWiki/job/xwiki-platform/job/master/6055/testReport/junit/org.xwiki.export.pdf.test.ui/AllITs$NestedPDFExportIT/Platform_Builds___main___integration_tests___IT_for_xwiki_platform_core_xwiki_platform_export_xwiki_platform_export_pdf_xwiki_platform_export_pdf_test_xwiki_platform_export_pdf_test_docker___Build_for_IT_for_xwiki_platform_core_xwiki_platform_export_xwiki_platform_export_pdf_xwiki_platform_export_pdf_test_xwiki_platform_export_pdf_test_docker___exportAsPDF_TestUtils__TestReference__TestConfiguration_/